Chapter 3 RESULTS 3.1 GENERAL PERFORMANCE OF THE SYSTEM During Shot Cherokee ali rockets fired and good (data, pulses could be heard well with no noise background) signal strength was received on all channels. The blast wave stopped two generators at the launching station, causing loss of the rocket-launch signals. However, data from later firings provided sufficient information for computing the launch times. In spite of relatively high radiation fields (3 x 10‘ r/hr) no serious attenuation of the telemetering signal was noted. There were no gata on channels corresponding with rockets shot at the stem. It is probable that these projectiles missed the stem. All rockets fired during Shot Zuni, and good signal strength was received on all channels. Radiation fields that were measured were lower than those encountered during Shot Cherokee. Channels corresponding to rockets aimed at the lowest elevations had no data on the carriers. All Shot Navajo rockets fired, and good signal strength was received on 10 of the 12 channels. Radiation fields meas.red were lower than those previously encountered. Channels corresponding to rockets aimed at the stem indicated low activity there. Four spare rockets were instrumented and prepared for launching during Shot Tewa. All fired, and good signal strength was received on three of the four channels. One transmitter failed shortly (about 5 seconds) after takeoff, and one transmitter was considerably off frequency. Accelerometers were used on two of the rockets. Useful radiological intensity information was received from only rocket (Round 3), In all events, instability in the transmitter-receiver portion of the telemetering system caused receivers to pick up rocket transmitters other than those assigned; also, there were cases of receivers changing from one rocket transmitter to another during a particular salvo. 3.2 TELEMETERED INFORMATION Tables 3.1, 3.2, 3.3, and 3.4 summarize launch conditions for Shots Cherokee, Zuni, Navajo, and Tewa. The column headed Azimuth gives the azimuthal settings of the launchers with respect to ground zero Stations. Figures 3.1 and 3.2 give roentgen intensity versus time information that is typical of the various shots. Tables 3.5 through 3.8 summarize all the information from telemetering channels upon which there were data for Shots Cherokee, Zuni, Navajo, and Tewa. These tables show only the information for the more reliable early portions of the trajectories, where the accuracy of the trajectory information was estimated by the contractor to be within + 10 percent. In all cases zero time is the time of launch of the rocket. Sketches of the clouds with rocket trajectories are presented in Figures 4.2 through 4.6 in Chapter 4. Rockets fired at the stem of the Shot Navajo cloud yielded no data although the rocket transmitters and transducers appeared to be operating normally. Contamination of the rocket surfaces was not serious. Table 3.9 indicates in terms of percentages of peak readings the contamination of rockets for which the telemetered record was long enough for contamination determinations to be made. Four rockets had residual readings